From kenos; to make empty, i.e. (figuratively) to abase, neutralize, falsify -- make (of none effect, of no reputation, void), be in vain.
see GREEK kenos
1. to empty, make empty: ἑαυτόν ἐκένωσε, namely, τοῦ εἶναι ἴσα Θεῷ or τῆς μορφῆς τοῦ Θεοῦ, i. e. he laid aside equality with or the form of God (said of Christ), Philippians 2:7 (see a fuller exposition of this passage in
2. to make void i. e. deprive of force, render vain, useless, of no effect: passive, Romans 4:14; 1 Corinthians 1:17.
3. to make void i. e. cause a thing to be seen to be empty, hollow, false: τό καύχημα, 1 Corinthians 9:15; passive 2 Corinthians 9:3. (Twice in the Sept. viz. Jeremiah 14:2; Jeremiah 15:9; often in Attic writings.)